Analytical Industries GPR-1800 IS ATEX Trace PPM Oxygen Transmitter - Manual (Page 29)

Advanced Instruments, Inc
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Repeat the OUTPUT ZERO OFFSET routine until the output is 4 mA .
Save the adjustment value by pressing the ENTER key or abort by pressing the MENU key.
After adjustment, the system returns to the SAMPLING mode.
Span Calibration Procedure
This procedure assumes a span gas under positive pressure and is recommended for a transmitter without
an optional sampling pump, which if installed downstream of the sensor should be placed in the OFF
position and disconnected so the vent is not restricted during calibration.
To assure an accurate calibration, the temperature and pressure of the span gas must closely match with
the sample gas.
For calibration purposes, use of the AUTO SAMPLE mode is recommended.
Access the MAIN MENU by pressing the MENU key.
Advance the reverse shade cursor using the ARROW keys to highlight AUTO SAMPLE.
Press the ENTER key to select the highlighted menu option.
The following displays appear:
MAIN MENU
AUTO SAMPLE
MANUAL SAMPLE
CALIBRATION
CONFIG ALARMS
BYPASS ALARMS
0.3 PPM
AUTO SAMPLING
0-10 PPM RANGE
76 F 100 KP
Return to the MAIN MENU by pressing the MENU key.
Advance the reverse shade cursor using the ARROW keys to highlight CALIBRATION.
Press the ENTER key to select the highlighted menu option.
Repeat to select SPAN CALIBRATE
The following displays appear:
MAIN MENU
AUTO SAMPLE
MANUAL SAMPLE
CALIBRATION
CONFIG ALARMS
BYPASS ALARMS
>>>
CALIBRATION
SPAN CALIBRATE
ZERO CALIBRATE
DEFAULT SPAN
DEFAULT ZERO
OUTPUT SPAN
OUTPUT ZERO
After selecting the SPAN CALIBRATION, enter appropriate span gas value.
Advance the reverse shade cursor using the ARROW keys to highlight the desired GAS
CONCENTRATION.
Press the ENTER key to select the highlighted menu option.